A chlorination tower filler cleaning device

Abstract

A chlorination tower packing cleaning device comprises a chlorination tower body and related accessories, and also comprises a circulating washing pump. A hydrochloric acid outlet is arranged below a corresponding grid plate at the lower position of the chlorination tower, the hydrochloric acid outlet is connected to the circulating washing pump inlet end through a hydrochloric acid drain pipe, a hydrochloric acid drain valve is arranged on the hydrochloric acid drain pipe, a circulating washing pipe is connected to the outlet end of the circulating washing pump, a steam jacket is arranged on the circulating washing pipe, a one-way valve, a hydrochloric acid outlet valve, a hydrochloric acid outlet pressure gauge and a sampling valve branch are arranged near the circulating washing pump on the circulating washing pipe, and one end of the circulating washing pipe far from the circulating washing pump in the length direction is connected to the chlorination tower from the top of the chlorination tower through a reflux valve. Through the device, the chlorination tower packing is cleaned more thoroughly, and the packing does not need to be disassembled from the chlorination tower, and the internal circulation of the device itself can be realized, so as to meet the production requirements of the workshop. In addition, the cleaning effect is good, and the cleaning is safe and stable.

Description

Technical Field

[0001] The utility model relates to a chlorination tower filler cleaning device. Background Art

[0002] Chlorination reaction is the starting process line of the cresol industry chain. Toluene and chlorine are reacted to produce mixed chlorotoluene and hydrochloric acid. The main reaction is carried out in the chlorination tower. The hydrochloric acid produced is absorbed in four stages through the tail gas system. When the concentration of hydrochloric acid in the absorption liquid reaches 30%, it can be stored in a large tank.

[0003] During the production process of the chlorination workshop, the packing in the chlorination tower undergoes multiple batches of reactions, and a large amount of dirt remains on the surface, which affects the chlorination reaction. The current method for treating the packing in the chlorination tower is to steam purge, then disassemble the chlorination tower, take out the packing ring, and manually knock the packing ring to remove the surface dirt. Defects and shortcomings of the existing technology:

[0004] 1. Using existing methods to clean the filler is not only labor-intensive, but also has certain safety risks;

[0005] 2. Manual knocking can only remove impurities that are easy to fall off the surface, but cannot completely clean the surface dirt.

[0006] 3. The strength of the manual knocking process is difficult to control, which may damage the internal structure of the chlorination tower and cause additional economic losses. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a chlorination tower filler cleaning device, through which the chlorination tower filler can be cleaned more thoroughly, without disassembling the chlorination tower to take out the filler, and the device can be realized by internal circulation itself, meeting the workshop production requirements. Moreover, the cleaning effect is good, safe and stable.

[0008] In order to solve the above technical problems, the utility model provides a chlorination tower packing cleaning device, comprising a chlorination tower body, a feed pipe, a nitrogen pipe, a steam pipe and a water supply pipe are arranged on the upper side of the chlorination tower body, a feed valve is arranged on the feed pipe, a nitrogen valve is arranged on the nitrogen pipe, a steam valve is arranged on the steam pipe, a water supply valve is arranged on the water supply pipe, a packing is arranged in the middle area of ​​the chlorination tower, a grid plate for supporting the packing is arranged at a position corresponding to the bottom of the packing in the chlorination tower, a discharge channel is arranged at the lower part of the chlorination tower, a discharge valve and a transfer pump are arranged on the discharge channel, a sewage pipe is arranged at the bottom of the chlorination tower, and a sewage discharge pipe is arranged at the bottom of the chlorination tower. A drain valve is provided on the pipe, a circulating washing pump is provided outside the chlorination tower, a hydrochloric acid outlet is provided below the corresponding grid plate at the lower position of the chlorination tower, the hydrochloric acid outlet is connected to the inlet end of the circulating washing pump through a hydrochloric acid drain pipe, a hydrochloric acid drain valve is provided on the hydrochloric acid drain pipe, a circulating washing pipe is connected to the outlet end of the circulating washing pump, a steam jacket is provided on the circulating washing pipe, a one-way valve, a hydrochloric acid outlet valve, a hydrochloric acid outlet pressure gauge and a sampling valve branch are provided near the circulating washing pump on the circulating washing pipe, and the end of the circulating washing pipe in the length direction away from the circulating washing pump is connected to the chlorination tower from the top of the chlorination tower through a reflux valve.

[0009] The above-mentioned chlorination tower filler cleaning device and cleaning method comprises the following steps:

[0010] (1) after opening the discharge valve and exhausting the materials in the chlorination tower by the transfer pump, open the steam valve, feed steam in the chlorination tower, use steam to clean the organic matter in the chlorination tower, the steam temperature is 110-120 ℃, the steam pressure is 0.1-0.2MPa, and the liquid after the cleaning is discharged from the discharge channel through the transfer pump to the chlorination tower;

[0011] (2) opening the feed valve, injecting the prepared 2% hydrochloric acid solution into the chlorination tower from the feed pipe, the amount of the hydrochloric acid solution injected is enough to cover the filler, then closing all valves of the chlorination tower itself, starting the circulating washing pump, and circulating washing the chlorination tower for 12 hours;

[0012] (3) After the circulation washing is completed, close the circulation washing pump and the corresponding valve, open the discharge valve and the transfer pump to transfer the waste liquid in the chlorination tower, and inject the transferred waste liquid into the external washing tank for storage after removing the filter residue through the filter. Subsequently, the pollution degree and hydrochloric acid concentration of the liquid in the external washing tank are tested. If it can be used for the next batch of cleaning, add hydrochloric acid and store it temporarily. If it cannot be used anymore, start the washing tank for stirring, turn on the liquid alkali pump, and add liquid alkali into the washing tank at a small flow rate. When the pH value of the circulation port reaches 7-8, it can be transferred to the environmental protection workshop.

[0013] Advantages of the utility model:

[0014] (1) The overall structure is simple and easy to use. Through this device, the chlorination tower filler can be cleaned more thoroughly without disassembling the chlorination tower to remove the filler. The internal circulation of the device itself can be achieved, meeting the production requirements of the workshop.

[0015] (2) The cleaning effect is quite thorough, and the surface of the packing ring presents a metallic luster after washing;

[0016] (3) Raw materials are easily available. Hydrochloric acid is produced in the workshop, which will not cause system pollution or waste of raw materials. The operation process is simple, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] See also Figure 1 A chlorination tower packing 13 cleaning device comprises a chlorination tower 1 body, a feed pipe 17, a nitrogen pipe 11, a steam pipe 17 and a water supply pipe 12 are arranged on the upper side of the chlorination tower 1 body, a feed valve 171 is arranged on the feed pipe 17, a nitrogen valve 111 is arranged on the nitrogen pipe 11, a steam valve 171 is arranged on the steam pipe 17, a water supply valve 121 is arranged on the water supply pipe 12, a packing 13 is arranged in the middle area of ​​the chlorination tower 1, a grid plate 131 for supporting the packing 13 is arranged at a position corresponding to the bottom of the packing 13 in the chlorination tower 1, a discharge channel 16 is arranged at the lower part of the chlorination tower 1, a discharge valve 162 and a transfer pump 161 are arranged on the discharge channel 16, a sewage pipe 14 is arranged at the bottom of the chlorination tower 1, and the sewage pipe 14 A sewage discharge valve 141 is provided on the chlorination tower 1, a circulating washing pump 3 is provided outside the chlorination tower 1, a hydrochloric acid outlet is provided below the corresponding grid plate 131 at the lower position of the chlorination tower 1, the hydrochloric acid outlet is connected to the inlet end of the circulating washing pump 3 through a hydrochloric acid discharge pipe 21, a hydrochloric acid discharge valve 211 is provided on the hydrochloric acid discharge pipe 21, a circulating washing pipe 31 is connected to the outlet end of the circulating washing pump 3, a steam jacket 311 is provided on the circulating washing pipe 31, a one-way valve 32, a hydrochloric acid outlet valve 33, a hydrochloric acid outlet pressure gauge 34 and a sampling valve branch 35 are provided near the circulating washing pump 3 of the circulating washing pipe 31, and one end of the circulating washing pipe 31 away from the circulating washing pump 3 in the length direction is connected to the chlorination tower 1 from the top of the chlorination tower 1 through a reflux valve 36.

[0019] The above-mentioned cleaning device and cleaning method of a chlorination tower 1 filler 13 comprises the following steps:

[0020] (1) open discharge valve 162 and after material in chlorination tower 1 is exhausted by transfer pump 161, open steam valve 171, in chlorination tower 1, feed steam, use steam that organic matter in chlorination tower 1 is cleaned up, steam temperature 110-120 ℃, steam pressure 0.1-0.2MPa, the liquid after the cleaning is discharged chlorination tower 1 from discharge channel 16 through transfer pump 161;

[0021] (2) open feed valve 171, inject the 2% hydrochloric acid solution configured into chlorination tower 1 from feed pipe 17, the amount of injecting hydrochloric acid solution is enough to cover filler 13, then close all valves of chlorination tower 1 itself, open circulating washing pump 3, chlorination tower 1 is circulated and washed for 12h;

[0022] (3) After the cycle washing is completed, the cycle washing pump 3 and the corresponding valve are closed, and the discharge valve 162 and the transfer pump 161 are opened to transfer the waste liquid in the chlorination tower 1. The transferred waste liquid is filtered out and then injected into the external washing tank for storage. The pollution degree and hydrochloric acid concentration of the liquid in the external washing tank are subsequently detected. If it can be used for the next batch of cleaning, hydrochloric acid is added and temporarily stored. If it cannot be used further, the washing tank is opened for stirring, and the liquid alkali pump is opened to drip liquid alkali into the washing tank at a small flow rate. When the pH value of the circulation port reaches 7-8, it can be transferred to the environmental protection workshop.

Claims

1. A chlorination tower packing cleaning device, comprising a chlorination tower body, a feed pipe, a nitrogen pipe, a steam pipe and a water supply pipe are arranged on the upper side of the chlorination tower body, a feed valve is arranged on the feed pipe, a nitrogen valve is arranged on the nitrogen pipe, a steam valve is arranged on the steam pipe, a water supply valve is arranged on the water supply pipe, a filler is arranged in the middle area in the chlorination tower, a grid plate for supporting the filler is arranged at the bottom of the corresponding filler in the chlorination tower, a discharging channel is arranged at the bottom of the chlorination tower, a discharging valve and a transfer pump are arranged on the discharging channel, a blowdown pipe is arranged at the bottom of the chlorination tower, and a blowdown valve is arranged on the blowdown pipe, characterized in that: A circulating washing pump is arranged outside the chlorination tower, a hydrochloric acid outlet is arranged below the grid plate at the lower position of the chlorination tower, the hydrochloric acid outlet is connected to the inlet end of the circulating washing pump through a hydrochloric acid discharge pipe, a hydrochloric acid discharge pipe is provided with a hydrochloric acid discharge valve, the outlet end of the circulating washing pump is connected to a circulating washing pipe, a steam jacket is arranged on the circulating washing pipe, a one-way valve, a hydrochloric acid outlet valve, a hydrochloric acid outlet pressure gauge and a sampling valve branch are arranged near the circulating washing pump on the circulating washing pipe, and one end of the circulating washing pipe in the length direction away from the circulating washing pump is connected to the chlorination tower from the top of the chlorination tower through a reflux valve.

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